Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f319cd723450e331d888e13a1431e88887814b858fc3935ccb44999f6dcc69e8' 
  AND token = 'sruDAvluqnaTBjvpHMVOcecJ5JKQ6sOfZ7ylXxt2Ylk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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