Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'af59117bae1cdd1604d3d922611f165290cc3b91899abd13d81aa777211f358c' 
  AND token = 'lLXddVKiKz+HMMjN+ODeU3ZhKr4iW6bVAPZ2hXgya4s=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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