Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2e841ce37560033e86d7c4a3ceb85abe4114aafea6748127d1faf7dfa65c5a08' 
  AND token = 'Z0UO/QLifGPV++KzymyL5GDG2QvDv6syl0asjFEcRF4=' 
  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"
    }
  }
}