Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd485ce4dcfe5f2310b4b508bd34d0259e9ccd40789b9fa8b637911b0927b333d' 
  AND token = '9NeWx4KfHoGUJZt7cQ95RSln8FdyMpYo8huy5FX509c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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