Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'dd7ded8f5961457e0d910ffec48290291d188911b5c5644801da4bf55bd76bb3' 
  AND token = 'SPASQryOjEy1y6/1hCYVcX4kQCqUr48izVuOlUmI61k=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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