Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6ccfbcbef665efccefe2f804efcb7807646ba3f0058d3c27d2558a49ba14907a' 
  AND token = '/6JbfeIMrwqu58yWRjThRfhRMKHVWA+cGLyZ9pG9RGI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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