Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '47de2da18fe90c8340e51dca1b9d8a026acc0dbf4664693fbf0d5ed61a5654b0' 
  AND token = 'kt/6KGJQgvC3vCjUOLWYks4JmQoTG37eB2MKc4jRjUc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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