Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f1ece5cdb3daf8e46f8f713c610b6286f4f57fdf9a687824e9f4d691643eb750' 
  AND token = 'V/y3cAlDVECuS7m229JqfFE72pGjCL4wlx1OPk8ma3U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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