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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3d1013a0f9283799e780a4557a4f70a109088f1dc44a9ec22f4e692a9e228b0d' 
  AND token = 'eazchcRcwgPf4esYwCxlIWosazNUabPtv3brm/NGzGw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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