Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0c6f8148aec78965b9e1e10361d911f81066b6c824cc2289401a95be64145422' 
  AND token = 'wwIWYxN8E2bkO0Ewfh58XcEmi1tjjIJ0iuKJWhpaDqA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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