Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '555bb47d2494a2f48ad35898207710275eed67ee0128042093b47bdd0b8568d1' 
  AND token = 'MTRrrZW5V5TJgnMJ+vDP2uvFS6JOZrsM67sOAgDLwlI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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