Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6214d3fb8d5adbf0e96406c2482b3c6c86079b74b240803ee4b73ae261195d84' 
  AND token = 'Dp2fEDgfhsULfRCWMGHU+dMMmjSSa2SOrxfSnZoA4/w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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