SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '32c480a8537dc0520ee07cf825bc1905aa3ee4872bad2684f264ae855f5f5c57' 
  AND token = 'rFfhW1Fj9RgYBV+XrQy/C4NHIKJomQrwT80MzN+iiTM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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