Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '81b9001d3ddb158f51dbdb788071ab00a4ca8bec3b08746dd55eaa5a14719684' 
  AND token = 'uW8ut70UdG66sIU/vAHwkHYSoe3Jeifh+9gF9+lmb/w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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