Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '817db497a46215378bb7ddd4caed508a2bce78bef4d8cd072d033e8e328c98e3' 
  AND token = '1yd1J5zfK41jwI8nIKugghOhJIGyXO8QYuG/hU7UvoU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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