Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '18c4ebe8a834b228372572c088b2588ba62ba94372586ca5d1b1394171b101b1' 
  AND token = 'vKo5BsgOxzfo04zptLTI+P6KEXGueyj+VzTjk3Hg0rA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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