SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ffe8bd8d656cf1fa754fc3c82af4b858cdd853ab5cb5275dc7ca6ec4fd9a32e9' 
  AND token = 'Rnygrzi3Jr/p6kRvMqhJcvABFvjI7ZolTbqx2W6HwMU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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