Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7b960b3499474b80479cb87c213b79e0255b15f1418bdab80b8eb41cd3fcb66a' 
  AND token = 'JFZZ5QHwxXRdHOsVdyagZuhuJQPDWVikJ24mpXF6hME=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}