Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'd5d7c371cb4f74c2e1dc0c81094da9d62a11f700cbf6627e96356297421067aa' 
  AND token = '1uw3FiH4HBybombvhjbk7Jn/xuadix9ksGVA2E54+DU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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