Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5b1c413c7d95c03493ef01f4db7f6c064deb10d2a0bcbc1dfd0a213e9d1f525d' 
  AND token = 'A9gYEUvyIC1ZduZFDtLO5ksagtqZEdqzvL0FANv2Ptk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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