Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e3fafcd5004bf69230dd9dfcae548d48c14dcbfaf0f1be5e9b94841cbea12c13' 
  AND token = '6lkCXV90WOE11Rwwov1u56t0wI5wRQNbMW/BO955FHU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00053

JSON explain

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