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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '95201b9b89b8a3f8de60d2ea7bd3c5b6c1bd32c8bfa221b2916184952f2204e3' 
  AND token = 'vb1qTtl8Zi7sSdI2rxjaDrcy7/y83FGvlmKcKXsunck=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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