Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '039e3946cc1ecc0eb80504e28d8df9acc92844fb0b34dc17f974cc3d69629e23' 
  AND token = 'MyLXxf2t+IavDj7ukPExGDd9dK7m3Cn/tUA83u5CJSo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

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