Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6603343aba14f325500d989f9caced1031b7576b8f9beb5e5d58523a5edad037' 
  AND token = '+4mdQYfkR0y/5oW4KqgwcbmqWe8bRZDZPDm3bIjkFuE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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