Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b5a556bb36181cb0771c924dc95a182e1dc3a043792a9c7aa44dbc829dfbab46' 
  AND token = 'Am6zrcnHbr75EdvNTwhySjNGV/PezAxt3zdY0txoVo4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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