Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ec0d5adde4a9ab3744dd7925f5048e0f0bbf125837d17f8ee2c3521b927ed17f' 
  AND token = '9di9oOEIgQXfT0SlrIr/Lg9hd3e4YiXQh+wyv8dFCoo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}