Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a2e67351cf3d51887946a488d1e4a8bc59d35e1c3ac86684df51fe61abe21dd8' 
  AND token = '9OuzFZJen07f7x/ri2vlTG/EoUNMlDPfTOCzj0zan5Y=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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