Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2260cd31c597e2dbd652f13a0681008353a8b44b3f5f0de01229354cfcdc3d95' 
  AND token = 'PJOY/NYv4InOtZMFJ02cTIYmJUMWl2JN4BiQJk8aMV0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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