Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '405e7e549b9c69a3b7456d90b3d1e9c6412554e2ef5019622b4f45012626ff8a' 
  AND token = 'fgSgIOeYDXw9hd8nvck+n94KAMIU/1RCxSfqqh8HLfc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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