Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0ebc12fe3b484d9a95750069fe811239c504d89af396293120814cc2217190f9' 
  AND token = 'VvEmwbe+fbsm5VK1D4dL+IhRfni3B+ZJ2kVps99wo6E=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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