Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a2d461b756019efdb3e24483c73adbe60628d184207a65443829adaabfc6e8e0' 
  AND token = 'Z9ncZTBe7BErmwlKf72wPSMzPy/QD5AR30COyt7i3to=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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