Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '83507c342e07bf5a9cc6ac2d02db9fc2bf1eaa6a36ecfecb0a57211e05736955' 
  AND token = 'WaSulgUu4ITSJt10BbdXvOb9KGujFiCl2no/6PytD0I=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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