Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fc3a34e8c6f9dd4dbb99f8d396f8f545ae48a64904b0e3a111925303dab8a64a' 
  AND token = 'E0OT0I1KwwefLa7fxkKh6S0r7rq2Igxc6sYFOryA7LE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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