Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '998fbd05054f30c4119fbe91a5080c4cb510c608d9fc71691094640f17b568a8' 
  AND token = 'EYk5tCbpOw90STOtskJ+N3urfQt97Z2fnvmyohpoLEo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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