Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bf23ae1e32e6007d42f722051e338ee049d4086526743cc94ac845ebd767e5f1' 
  AND token = 'ytmb6ZV4bPzn0sTHYzLr8/4kGNrBTf7cKo1aSjR7FFk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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