Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '00448ba14b1048cfd141ff816ccfa4d15cd666eb1f04583b1e60ff76e9d409e6' 
  AND token = 'Xk5axMDMjl9+7s+VbPNCcPWnWOXi8AH/X815B/TUgog=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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