Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e1dfcbc4a58cfcb48dba0708186d958979eba8dc7c1379495ae610a7fae044fb' 
  AND token = 'h6Dz5kjmf004iztbQ0HSBFtYNvfRqLGCB78JrV2A49Q=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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