Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4ca0b4767397fb68d8ba47ecc7df4f56dfc7d57c823638cec67dacd6dadc3523' 
  AND token = 'YtkHnRVRsO2KfG/UCX/ZC5+wKAmND8wN7WRLrz71yj0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}