Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4f1edac40b958b63893bf4d0f47edd13fdb27a026e5872240d5ed6113cfaaab9' 
  AND token = 'XLnb0eA4EPorbyATuXO0mTP/MZVFiHP+2QpbrpgE7Ik=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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