Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1a2645581b17d310ac3a62c048f7093da11d8ade2a8154f0759bb00272ca121c' 
  AND token = '/BKedhgrbgHgyJ1CoWJFvrwWPXRwBicvJvpfJYEfDY4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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