Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9c0097f75312bab1f7b213a972a97b0ef33fafc3782731b9e92e61ac8f4b9bb9' 
  AND token = 'V3LeUpPuBLxRhx4lzUD0uQN6OldLDTbghUQqorJtwls=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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