Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7f2221e5428f106e3463cc19bff890f40929ff3793c743d9c77d7717cd418d29' 
  AND token = '8eDh6p7W1k7Z9TLYkdRG3kHQ+X14usWmjLp8t7ySxnE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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