Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6fc593b1645a3b261d3ac9264a70bdb493825795e671f0a081e15f54c07249ac' 
  AND token = 'TW9OMubtsMATechXuql+ZLvjy4tmEN/0Dja4aJMt2C8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00051

JSON explain

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