Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a82fdc0ead776e9dfc9e5848dababbd1c690c523627afa83cc9e10aaeaee3a83' 
  AND token = '6hYb0nTy1a1oVe80VpvhoRvevYInp/lzSQf9KnyrdEE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00009

JSON explain

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