Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b33d120cde81612eb03e5db4401f58883ee680daa7be0ee4edf548330e13f17c' 
  AND token = 'jcFHb0vFM1BtGRNuECu7/lvpCpD+7/o71/r1tbSgLwU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00048

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}