Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '066efc80cab5fb56d18979c9345fb655c2ba575aa03e4b652f0d0cefcbca1546' 
  AND token = 'a3HnTcFtnPK7jzIedkyAS2fkniuo+yWH0KnH5DBsTno=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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