Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e5db11c36724e7c65fdaf7c6f3e6214635978a6072cedeed331dfa41cd15e87d' 
  AND token = 'RKVsHA8ijpTH/HuwMHR+bQ07HbM9YkDj/DorTPGINok=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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