Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '791f75c9e790768ae3d8c583d1db8c03181807c161abef28a50d9d13a51cae70' 
  AND token = '1a23HWFqkBCfuly3b7oFGIM9sGkYZ2P2NaQ3viAJAbo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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