Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3a172a1a612742df477125f7df32f0d28647c92e480dd2ece10153c7b3498daa' 
  AND token = 'NirhWDgF9i1X8a2+B22CZLRq1+nh54xGLSpVVVS4NCQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00047

JSON explain

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