Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5c7c39ddad450f874d71ad7c3690d124d34599804140a1dfed699fa526e39d12' 
  AND token = 'pGdVzmJKCn89lb6jSEFZvQ8dS0mPJsqvwjNO7An4WJk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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