Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1ddcfe2c1c3c6991af4aa19eee50221359ce5524c33478301593d2c3d6029ace' 
  AND token = '54TIibLpHaFd3zDv7azANduq1KzWw/Qy8ORK1/Yyz+8=' 
  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"
    }
  }
}