Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '147b1f0fd2202c9d4f34183b456a2cda289b507213a7bc6edb4246cecc2ea994' 
  AND token = 'hiZF1ouZFsgl2ed5QzRZNpnzICPlaP0rATsJdp/7Ndw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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