Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fae662df76762bc132b16995a4d1454f681bf3248cd6cef0d233eb4d1ee64fc0' 
  AND token = '5JL3K+FkxIfkah/ZIrV1P4ZRedvV6y+IR8kiJpUF1E4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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