Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd1627cf5d60e0852e5309afdf3fd2eef74373d946ea905b532d182eaf33540ed' 
  AND token = 'gx6MJtKcky2YphCh4WeTk4m+KRxsqF36TYMIq/YasKA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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