Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '2aeb283d12586bf0ea68cabaa2aab4ad8dcd9b898facba84fcfdc83e5a77ad9b' 
  AND token = 'nwXwlXx4pWISkHIWQYgJq4WBxCF4WDQeos50CzUwxZQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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