Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6f1cb6cf4cdc34e1c7d5e94b96c086bf4d2e78b7a530764e698099195ff8122e' 
  AND token = '7jtTaIkPc/t+E25TVGXfyQKWB+fmTffHjeRFzh3sWho=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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