Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2c61752455c8fd11a02b980be0119c0b3642db246e5ff1880c971cca1522a31d' 
  AND token = 'h9+KfvUCX7JZCgfaQMonPIOJ39+dsl5ACpXrdZvf0Es=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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