Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b89f67215de5945eb1208bc993fc7acace6229276cc46d67af82524bc8cc6abe' 
  AND token = 'WmM5YvhHgWks+bM5+sX2TU/XsTE0ypayAtcRHs/exQY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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