Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2b372e530b0307e57f60ac2e3fa3b9f88f578eb73792de697615bf7420626c98' 
  AND token = 'BmppyipxpOvL9+Szj5cnq3fvjIO04BRBHpzibmtR9Ek=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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