Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '561f37514ea6bdb1f9e7f39aad4f7172afa5ad5cb8cadf031ef981f9e4421780' 
  AND token = 'X6Rhem/F5VNfohCuZLNC4HvHsOzhKHDVdNPwiMrt/A0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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