Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd944bbbaed53e112715f2673fd8736fd2da42556d000e2ce07fdd42ff45ae361' 
  AND token = 'TT+L8Wf5fiovpl5LApjLQ4PgVVzhNCz36Nm2t/ZNfxU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00047

JSON explain

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