SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'd8db0aa1ba22c6341c42ca137af7eb4e184e779c73b71c79e9d663c684255b45' 
  AND token = 'fYxn3qlwLXa1bh8GwcWFcElqv6AYbzHnD/o1ZyMJfZM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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