Sandbox

SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = 'cb33efe0d4e52444a12c434e96463e07f90946efa7e0a3ad730cce2367a6e3b6' 
  AND token = '6VS1vgFuaSAF3C5vck4ue6ZIVBrJkHgkUnbjNNKz6qM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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