Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fdc3a18779ff3b1ac1599798ee4431a6ddf72baad7309b01001a5e2338f5e537' 
  AND token = 'sy5K59VjWXqF9XuQNZG4EU8VvGDPeZLIytJ42u92PMs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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