Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bcf6b5a64b0f21112185b0f21264809e2ae8afd8335c6c80aa1bc90c4fc0626e' 
  AND token = 'BMFKpCbh3FqtHzLhfsfJmQKav8p8gj0FXB+mXjZbiiQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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