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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5132263b3d75226b3a1cc60d1168977c0d5106681dd0ae675ec36df79a6cacf5' 
  AND token = 'Y5YE0ICLAndU8E+pRA4U478mPwhftS8Ue+etPmaCcXY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}