Sandbox

SELECT 
  1 
FROM 
  cscart_multi_declock_keys 
WHERE 
  key_id = '44e8d86926cf5d3aba74c82e94d1a1004bf57e3f98575c95f9ca4b293a526cf3' 
  AND token = 'TDaCACmH/tE52T+gWvWY6NuJq7lOoiSmGLIqE0af7I4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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