Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3d7e48c8a6aba9af70ab629ebd576431f720e30e57fa6cc2ba1304493d3a7148' 
  AND token = '70fD/+P7DqEL8e3FkZLSLNEk7CH1sh17QiKXwJBjlSE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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