Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fb01ebe5dbe32d6af69ecb1bf1e40ae83c5b9ca033d82f5fac2d7813f4628d74' 
  AND token = 'QVxrkpBGt4upVhTCKCpbgz8rXRM2zyFJAV00p8XHh0k=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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