Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f98bb29731efeaeb8a70a1ddb58a703f360c71bba09688e6db7151df7ab6ce55' 
  AND token = 'hR6VomyWP/y8UFS3K8JenamqSasmY0SXJ0e/16ol9iM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}