Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '093ff0da8dc0832d4b1683239049ddea63a974ad0731de1d15a7fca4ca0a2c13' 
  AND token = 'aG2qcdlLEbrIW2Lzt82foVXbr/Hqv93yUqQmOynjiek=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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