Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd18af70986427f5473a3948e32485f624ed6d0eed0ac99c8e9bd9e6dbe85c227' 
  AND token = '1TF+am+o9iMJnsiEJ8r3PQFrSTM1O6ZfeJhshs5rmhA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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