Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7d9e493678ebcddc0c1235619aeb6ed5e47239890f52cbb162eef1efd1866b46' 
  AND token = 'VRlzBe9DQD7sq0S4s3PJR5lTE7XH3TtpUASulUvudBk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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