SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '901f63aed210e831602d9b19c83040300bd5f152c4a74cedfd71b0c77f7d5587' 
  AND token = 'G/diJq0Tjf6cQOl9YnyJrYJW/zngvJBdAaKWxgQW2iw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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