Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e6f24f3f2e6e2e8688bb066477f46db52851cda8309a2fdf1ef1de74f6b1777d' 
  AND token = 'kFWEQi1FfOef+z5ZdOqheemzw1sTQkMN0kSWQDBQdDo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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