Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cc03433d5fd7c361c3edd1a787e99a12e1b5c7ccc0af98d229a395bb04698391' 
  AND token = 'EVZA82mmK11+akSIbfaltLOSpsNWNegCntsDy4Iyj04=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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