SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'e4631d22756a008bcd271813475b8d5b3e6d943e3b2461fec9e31f69bd62051e' 
  AND token = 'saVru+KDOHnEmhOv09YhrjwnJ6SAViU+B6v+kIOuZMU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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