Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'dbcbab815fd386a3dc349115b5241f60173661d521f80fbdfb5c23950cada819' 
  AND token = 'fpw5QZMfTCYqE3YdXzXLls9cqgrAYiQxA1tGmj8vOH0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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