Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '9d634d275307cf6d5cb8b196188d5fbdb8eeee44e7e48ccf8c4178ff7ca5a136' 
  AND token = 'BxRyP1l1EhZgtF6Hp5pzVWGOpaJCII67kxRs4OHJKo0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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