SELECT 
  1 
FROM 
  cscart_multi_declock_keys 
WHERE 
  key_id = '7a70a5d26a4926cba4a67c0c3d380b2535dfc4b26c819ce13d6585dbf3f4c740' 
  AND token = 'QswfTy/FG+B7GMJmS3/oeCy+RHqxKfZwS215r3wiYp0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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