Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '1c61746733e2a50455f446c398efd81743bcde0be2823495350ca2180ccb7bc0' 
  AND token = 'xaTVCUdNuj4iz7VlTPuyNKgbM611+XXI7ltWJQpJ57Q=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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