Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cae5c0dbb3f4af98ada187dad165e4a7e4b15b9bbabc16eb5c115a14fde7f24b' 
  AND token = '+wC9B2SrC4c4f8vtpJAirypj62T/sZ9cCBHujqVUHw4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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