Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '30f86cb87d0b052cacff6ca16d2ef6fda710ec37b5c0b847009e0ee48e693aeb' 
  AND token = '43CuMbqQ2/74e/hLZnWVI0jA8IZoh2LXA7GWMWsikTo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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