Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fab5bb4ee807c21030d1f3d6df8be9cc7c754f843aa45f1d3f49e2cf3356b5e4' 
  AND token = 'lotMx0gIgfKaXyPBDB6L5gFmlbK4ernkJYDe9LBBOCQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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