Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0abf8eedf4ba3784e358a80777139fb4dd185d53949d89a19cbed069c6433d6a' 
  AND token = 'zte1qUgKr6sR+tH/eqQAmPT9ffzhgG3XE5xN2Ia2TYc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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