Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '93dfc1739fc3278a80bb7d4811a3d383b6e2b597fd26b8969e92aecbd1bc28cd' 
  AND token = '7l8MWD512HfNtxRRc9Z+7QRzRIZGoztvcpHKoJXZefo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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