Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '186fc253f5f75091461e3e6ce4f42d282f7ed5d2304914598bc3b0a3aa2292af' 
  AND token = 'zp8Cf54Fnu7e31F1oKImnY+zjoa3HEfxgQHyrIdUbX0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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