Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '082d63c67385f86f6d6dd9af82a3fa24f635b7f8b53aaac4b3fa27ac5daa94f8' 
  AND token = 'N5P7PnGwBV+gxxlZ+SqNDGeDwyjCNBqIfWuM38j70dM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00052

JSON explain

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