Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6feef1fa182a05acf0e19cdd9a2c8c976f67b5b8c2f0a796c6c6993bfedcfaee' 
  AND token = 'Ecl5rdG11qpAr+s+NG92HttaFVJHCdhMkIGJ+eA0g+E=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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