Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e1ca3902246f4c1a32d5de8ecd2dba950cf92d273431ccccb3b271924349c1a8' 
  AND token = 'KfpMbMbHYSaAIV7jX7fOErDhoSfdi03nrIyrGGu5hYY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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