Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '37abdf4afa9b4f5a37b5f7146e2430febd7ad5ced134557b021ead1fce2d04de' 
  AND token = 'arDMundDBF9CbOQyrvW4Pm8STag4zzhLHV7RltIefQ8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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