Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '77d32cd7e77fbf118472585440a1b489878a92c9d242141a2bee4b60850698c1' 
  AND token = 'lhtwxPXYN7HveP/ZcpA7B228qwFE6UgK9XWIdYaVxhI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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