Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7485de47b2d53c7806c13dd0634699992d10eb373a23794289e52cd51b82ffbe' 
  AND token = 'ha5zPff11Z96d748Er7MZxL2daGacHZGoQNcsGxOIyA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00014

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}