Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '922540aee7765f884f96e5fef9c5ae8383ac2482f2781908415bdabb1e79bd8c' 
  AND token = 'bKDc1GSPurPKM0TEQH2hLjuR3rhllha468ty3nPickU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00014

JSON explain

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