Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '936c11be4af3b62aad1d6aff03fcb1c7337242de0ee10f96d1b83772bda9bec3' 
  AND token = 'V7IOZ+yyV7kcaKIs4S3478R5Yf+HlukSdpCAoy8Znl4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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