Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '841090a0c57c611017d9de31389e7a083f28f649af43633d77ccd3d4d0f47258' 
  AND token = 'QGzxx3ZQTeflBVcmmxhT7L0oWkJ5ISO9UAXMnwOLfuk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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