Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '63ec67ab55e00aff3d12dbe327145f4ca7824492a992dea3121459997765ed86' 
  AND token = 'OsSbMNwbgzrk2sJ9+rKANya7iY2cGWM3s3SXdkdNC3Q=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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