SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7183bf9b87748aec09313b5694552d93edabc76bfe712d99dde4ddd812b19eaf' 
  AND token = 'UIaHHuQRUQxXhfm3+7tD0Pti6ZPYfzAPhVZfWbjlGto=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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