SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '826ea3d17155f29444199395102ab11c61ecc7e8f5875ab1a1146fc16300b1f5' 
  AND token = 'cRYGnugKmEDJmIBqUN8nIjzuV1VJMFLfDvQ79WtZ8OQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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