SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '04274573b3ab8a261d8ab56776813edb3c484082219fb7a246890443e0cc86bd' 
  AND token = 'VLiXqc/5/IDZ/Ghu/G6tC28aZiWLAJ7NHfm/12NqfZs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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