Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'fa017c1b2cf8c7fb884feceb79d8e3732a6025b0b5c5a920f81a3ffd2da39e2d' 
  AND token = 'GNa1Boa41CFymsw0HYWL37DFs3zJgAu2kAgxK2GD9V0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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