Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '17b7d06472d7f04613724becd557a090d580230828b9e8c0dbe6117602d9bf61' 
  AND token = 'GvFy8YuMjbItCVntg2Ca/Jetjw//ytZ5rjMRABrefmI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00047

JSON explain

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