Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b353f740ab625ae044fcc4acaca31ebe7954d3ed18b583a88bd8ddbf8844baf0' 
  AND token = '8VgvIyDnd6LfnflMHEor8QHtBRnfYA8oQxH2vxQ5GaY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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